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  • Basic string and value functions in Objective-C for iPhone

    - by David Maitland
    I have very little programming knowledge; only a fair bit in Visual Basic. How do I take a value from a text field, then do some simple math such as divide the value by two, then display it back to the user in the same field? In Visual Basic you could just do txtBoxOne.text = txtBoxOne.text / 2 I understand this question is more than one question and is very basic stuff, but I need to get my head out of Visual Basic and into where I should be :)

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  • Manipulating values from database table with php

    - by charliecodex23
    I currently have 5 tables in MySQL database. Some of them share foreign keys and are interdependent of each other. I am displaying classes accordingly to their majors. Each class is taught during the fall, spring or all_year. In my database I have a table named semester which has an id, year, and semester fields. The semester field in particular is a tinyint that has three values 0, 1, 2. This signifies the fall, spring or all_year. When I display the query instead of having it show 0 or 1 or 2 can I have it show fall, spring etc? Extra: How can I add space to the end of each loop so the data doesn't look clustered? Key 0 Fall 1 Spring 2 All-year PHP <? try { $pdo = new PDO ("mysql:host=$hostname;dbname=$dbname","$username","$pw"); } catch (PDOException $e) { echo "Failed to get DB handle: " . $e->getMessage() . "\n"; exit; } $query = $pdo->prepare("SELECT course.name, course.code, course.description, course.hours, semester.semester, semester.year FROM course LEFT JOIN major_course_xref ON course.id = major_course_xref.course_id LEFT JOIN major ON major.id = major_course_xref.major_id LEFT JOIN course_semester_xref ON course.id = course_semester_xref.course_id LEFT JOIN semester ON course_semester_xref.semester_id = semester.id"); $query->execute(); if ($query->execute()){ while ($row = $query->fetch(PDO::FETCH_ASSOC)){ print $row['name'] . "<br>"; print $row['code'] . "<br>"; print $row['description'] . "<br>"; print $row['hours'] . " hrs.<br>"; print $row['semester'] . "<br>"; print $row['year'] . "<br>"; } } else echo 'Could not fetch results.'; unset($pdo); unset($query); ?> Current Display Computer Programming I CPSC1400 Introduction to disciplined, object-oriented program development. 4 hrs. 0 2013 Desire Display Computer Programming I CPSC1400 Introduction to disciplined, object-oriented program development. 4 hrs. Fall 2013

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  • Where to place a debug log files for my daemon app?

    - by sasayins
    Hi, I am using C language and Linux as my programming platform. I am learning how to create a daemon, and I want to create a log file so that I write a debug message in my daemon. My question is where should I put the log file in my system. Should I put it in the var folder? Please advice. Many thanks.

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  • Ubuntu server header timeout

    - by Tabatha M
    I'm running Ubuntu Linux 12.04.1 Kernel and CPU Linux 3.2.0-30-generic on x86_64. Intel(R) Xeon(R) CPU E31230 @ 3.20GHz, 8 cores I recently came across this problem. I'm using apache2/php latest and when I run $url_headers = @get_headers($url); Inside PHP it would normally take milliseconds to within a second to get the headers. Now recently it can take up to 15 seconds or even timeout. It has worked great for over a year and recently started doing this. I'm not sure how to go about fixing it, any help would be greatly appreciated. Thank you

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  • Windows Application Data Directory

    - by JP
    Not completely a programming question, but its close enough so here goes: In Mac OS I'll put user-specific files for my app in ~/Library/Application Data/{MyApp}/ and in *nix I'll put them in ~/.{MyApp}/ - where should I put them for Windows? I'll be using Ruby's File.expand_path to get to this directory, so if there's a windows equivalent of ~ then that's fine. (Answers for Windows XP, Vista and 7 would be appreciated if they're not the same)

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  • Do Java or C++ lack any OO features?

    - by tsv
    I am interested in understanding object-oriented programming in a more academic and abstract way than I currently do, and want to know if there are any object-oriented concepts Java and C++ fail to implement. I realise neither of the languages are "pure" OO, but I am interested in what (if anything) they lack, not what they have extra.

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  • question about heapsearch order

    - by davit-datuashvili
    ia have meet following problem suppose we have sorted array of size 2^k-1 where k is given number we should copy this array into heapsearch array b the elements in odd positions of a go in order into last half of the positions of b positions congruent to 2 modul0 4 go into b's secodn quarter and so on this is not homework and please nobody tag it as homework it is from programming pearls please any ideas

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  • Rss feed for game programmer?

    - by simpleblob
    I was browsing this thread, which has good recommendation but a bit too general for me. So, if anyone has a collection of nice game programming feeds,please share them. :) (both general and specific topics are welcome)

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  • Ubuntu upstart hangs on interactive start & stop

    - by danorton
    How do I get Ubuntu upstart to not hang on interactive start & stop? I have created many upstart scripts that work fine during init, but often hang when I enter them at the console. If I CTRL+C out, all that happens is that the job changes state. The script is never run. I’m running Ubuntu Lucid on a Xen virtual server with a Linux 2.6.39 kernel. Below is merely a representative example of many scripts that behave this way: description "apache2" start on local-filesystems \ and (net-device-up IFACE=lo) \ and (runlevel [2345]) stop on runlevel [016] respawn respawn limit 10 5 expect daemon script . /etc/apache2/envvars /usr/sbin/apache2ctl start end script

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  • How to create a screensaver?

    - by Dave
    Which is the best programming language to use for creating a screensaver? I am thinking of creating a screensaver to showcase projects i have done before for self satisfaction. How should i go about it? Thanks

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  • Object Oriented PHP books

    - by user275074
    Hi, I've realised just how rusty my knowledge of PHP 5 and advanced PHP programming is after completing some questions for a test. I seriously need to read a book or something. Any recommendations for PHP 5 books?

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  • See socket options on existing sockets created by other apps?

    - by nailer
    I'd like to test whether particular socket options have been set on an existing socket. Ie, pretty much everything you can see in: #!/usr/bin/env python '''See possible TCP socket options''' import socket sockettypelist = [x for x in dir(socket) if x.startswith('SO_')] sockettypelist.sort() for sockettype in sockettypelist: print sockettype Anyone know how I can see the options on existing sockets, ie those created by other processes? Alas nearly all the documentation I read on Python socket programming is about making new sockets.

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  • Netbeans platform tutorials

    - by James P.
    I mostly use Eclipse but have mentionned Netbeans on my cv. Are there any good concise and up-to-date tutorials apart from the official ones that could bring me up to speed on how to use the platform efficiently (shortcuts, debugging, views ...)? This excludes programming tutorials as I don't really need them unless there's a special manipulation involved.

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  • Is existed web markup languages with possibility insert sql query?

    - by MercurieVV
    Actually what I want - simple DB with simple User Interface. Like MS Access, but for web and it can be without Dragn n Drop, but described with markup language. For example if I want to create list report, then i need to write something like: <table query="SELECT * from mytable"></table> It needed for simple data applications. In that kind application no programming logic required. Just working with DB. Changing DB data and showing it.

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  • Basic Java question?

    - by LAT
    Hi I am quite new to programming, i have a question please help me. ( this question is java question but i can't remember the syntax but what i write here is mostly it.) A class Person speaks i am a person A class Student speaks i am a student Student extends from Person Person p = new Student then what is p speaking then?

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